Ok, this is weird. So I built a microphone amplifier using the circuit from here:

http://www.rason.org/Projects/hbmic/hbmic.pdf

It works perfectly, except it picks up police radio? WTH is up with that? If you don't believe me, I've recorded a conversation here:

http://iluvtocnc.googlepages.com/test.mp3

Can anyone explain what's going on? It seems like I only hear the radio if the microphone is attached. And the microphone wire is acting like an antenna, since the audio quality changes if I move it around.